Apparatus for indexing turret heads



Jan. 22, 1935. K. TESSKY 1,988,675

APPARATUS FOR INDEXINGY TURRET umns Filed Spt. '16, '1931 Y 2 Sheets-Sheet 1 Jnmewlor:

Jan. 22, 1935. v K. TESL-KY 1,988,675

APPAR A TUS FOR INDEXING TURRET HEADS 'Filedrsept. 16, 1931 2 Sheets-Sheet 2 Patented Jan. 22, 1935 I t UNITED STATES PATENT OFFICE Karl Tessky, Esslingen-on-the-Neckar, Germany Application September 16, 1931, Serial No. 563,102

In Germany September 22, 1930 Claims. (01. 29-50) My invention relates to apparatus for indexing of camming members in combination with means turret heads, and more particularly turret'heads for selectively connecting the means for locking in which the indexing is varied. To this end, in the turret head to one of the cam elements. It combination with the normal means for indexing has already been proposed in automatic machines 6 and locking the turret head'I provide a pluralito provide several cams and means for selectively 5 ty of cams for operating the locking means, and operating a member from one or the cams, but

means for selectively connecting the locking not for the purpose specified.

m a t one of th Came, In the following example a multiple cam com- The indexing and locking of turret heads, for p in tw a elements, n for h and th 10 instance by a Geneva-stop mechanism, and pa other forsix, indexing stations, will be described 10 ticularly inautomatic lathes, is normally effected in Combination w a transmitting mei ber Or by a disc supporting a pin equipped with a roller p at One end of the lever Operating vthe oc which engages in slots of a disc on the shaft of bolt which member is adapted to be alternately th t t head as t disc supporting th roller placed into active position with respect to the two pin is rotated and thereby indexes the turret cam elementse lever and the in pin t 15 head. After the head has been indexed it is locked Which it .i C ImeCted are in this manner alter- :by a lqcking t w h before th beginning of .nately operated by one of the cam. elements so the partial or indexing rotation of the turret head that the locking p either ges each recess was disengaged from t t t, head by means of the turret head, or each second recess only.

of a cam on the roller-pin disc and an interme; It is understood that I am not limited t0 two 20 diate lever, or other suitable means, and the elements and to three and Six indexing tahead is permitted to return to its locking positiOnS but may P d y number of cams or tion after the indexing operation has been percam elements for any p n ing numb r of. f indexing stations.

' t sometimes eeein-e t t in machine t t In the drawings aflixed to this specification and 25 ret head of which is adapted to be indexed for a forming, P thereof pp atu embodying my given number f tooling tat Say six, invention are illustrated diagrammatically by erations must be performed which require fewer Way of exampletooling stations, for instance, three. In such n the drawings,

cases it would involve loss of time to index the 1 is an end elevation Showing h G nev 30 turret head not only for the three stations re- Stop mechanism and its o es, quired, but also for the three other stations which 2 is a plan view of the machine p rtly in t required, An expedient would be t section through the axis of the locking bolt, vide on the roller-pin disc a second roller pin so 3 Shows the multiple chin With two ca that the slotted disc and the turret head would elements and the cam lever; ni a larger 35 be'indexed for two stations per revolution of the Scale, with the cam elements developed, roller-pin disc. There is no difliculty about pro- Fig. 4 is an end elevation of the cam elements, viding this extra roller pin as the roller-pin disc F 5 and 6 r Partly sectional elevations is readily accessible from the outside. However, Viewed from t right in 2 a illustrating 40 there is a difiiculty about the control of the thetransmitting member or i e a i with 40 looking bolt for the turret head, as it would be, the Cam elements in tWO P o necessary to exchange the cam corresponding 7 is a Partly Sectional elevation Showing a to six stations for a cam corresponding to three modified member pi n m dified means for stations, as the locking bolt must not engage in adjusting it with respect to h m e ements,

415 each recess of the turret head which is present- 3 is a Section on the line Vl1IVl1I in ed to it, but only in each second recess. This would necessitate removing the cam correspond- 9 is a p v w of 7, ing to ix stati ith th 11 i and Fig. 10 is a partly sectional elevation of another to replace the several parts after the cam cormodification 0f the member p 'it adresponding to three stations had, been inserted. justing m n 60 According to my invention the change-over Fig. 11 is a section on the li e XI-XI in Figi from one system of indexing to another, for inand stance, from three stations to six stations, and F 12 is a p a V i vice versa, is much facilitated by providing a Referring now to the drawings, and first to I multiple cam or a cam provided with a plurality .Figs. 1 to 6, 3 is a continuously rotating driving 55 shaft, 1 is a clutch adapted to cooperate with the driving shaft and provided with means which are old in the art andtherefore not shown, for throwing in the clutch at a given time and for throwing it out after a complete revolution of the shaft 3, 2 is a spur gear adapted to be driven from the shaft 3. through the clutching means, is an elongated pinion on a shaft 33 which is mounted in bearings 34 and 35 on the turret slide 36, and 4 is an. intermediate gear connecting the pin 5 to the spur gear 2. 6 is a bevel pinion on the end of the shaft 33 which projects beyond the bearing 35. 7 is a bevel pinion in mesh with the pinion 6 which is mounted to rotate on a shaft 37 extending at right angles to the shaft 33, and 8 is the roller-pin disc of the Geneva-stop mechanism which is secured to, or cast integral with, the pinion 7. 9 and 17 are roller pins on the disc 8, 32

is one of the three holes in the. disc 8, 16 is the slotted disc of the Geneva-stop mechanism which in the present instance has six slots 38 and is mounted on a shaft 39, and 15 is the turret head which is mounted on the opposite end of the shaft 39, as shown in Fig. 2.

10 is a cam plate which is attached to or cast integral with the bevel pinion 7 at the side which is opposite the roller-pin disc 8, 12 is the cam lever which is fulcrumed on the turret slide at 40, 11 is a cam follower or a pin in a boss 46 of the lever 12 for cooperation with the cam elements on the cam plate 10 at one end of the lever 12, and 41 is an eye at its opposite end which is connected to the shank 13 of the turret-locking bolt 14. The locking bolt is adapted to engage in recesses of the turret head 15 one-of which, with its bushing 42, is shown in Fig. 2. 43 is a spring for moving. the bolt 14 toward the turret.

Normally only the pin 9 is inserted in the disc 8, and the slotted disc 16 is rotated through a givenangle per revolution of the disc 8 by the pin 9.engaging one of its slots 38. By means of the cam plate' 10 the locking bolt 14 is retracted before the pin 9 enters one of the slots 38 in the disc 16 and permitted to engage the bushing 42 corresponding to the following station after the indexing operation has been completed. If it is desired to operate the slotted disc 16 twice per revolution of the disc 8, the pin 17 in inserted as shown in Fig. 1 and each of the pins 9 and 17 now rotates, the disc 16 through a given angle per revolution of disc 8. In this case, however, the locking bolt 14 must arrest the turret only at the end of each second indexing operation. In the old machinesthis was effected by exchangeable cams, as described in the introduction. Ac-

cording to my invention, I provide a plurality of cam elements on the cam plate 10.

Figs. 3 and 4 show two cam elements 18 and 19. The cam elements are arranged coaxially with respect to the axis of the shaft 37 and the elevated portion of the outer element 18 is shorter than the elevated portion of the inner element 19. The outer cam element 18 corresponds to the operation of the disc 8 with the pin 9 only and therefore its elevated portion is so short that the locking bolt 14 engages in the turret after each partial rotation of the disc 16 whilethe elevated portion of the inner cam element 19 which corresponds to the operation with two pins 9 and 17, is so long that the locking bolt engages ,only after each .second partial rotation of disc 16. The pin 11 is equipped with a threaded extension 21 which is inserted in a hole in the boss 46, and held by a nut 44.

7 It will appear from Figs. 5 and 6 that the to the axis of the pivot 40 of the lever 12, as

shown in Figs. 1-6, is arranged with its axis in parallel to the axis of the pivot 40'. The extension 21 of the pin 11 is unthreaded in the present instance and mounted to rotate in a hole of the boss 46. 27 is a spring surrounding the extension 21, with its lower end bearing on a shoulder in the hole, and its upper end on a key plate 25 at the upper end of the extension 21, for normally holding the pin 11 on a seat in the boss which v holds it against rotation. The pin 11 is recessed at as and for the purpose described with reference to Figs. 5 and 6 and means for rotating it are provided in a'casing 22 at the turret slide 36 by which the Geneva-stop mechanism is protected from chips. Such means include a claw 26 at the lower end of a shaft 45 which is mounted to rotate in a hole of the casing 22 and provided with a spring 24 abutted on a shoulder in the hole at its lower end and on the boss of a handle 23 on the shaft 45 at its upper, end. The spring 24 normMly holds the claw 26 disengaged from the key plate 25 at the upper end of the extension 21. In order to reverse the position of the pin 11 with respect to the cam elements on the cam plate 10, the handle 23 is depressed against the action of its spring 24, causing the claw 26 to engage the key on the plate 25 and moving the pin 11 away from its seat in the boss 46 so that it is free to rotate. The pin is nowadjusted with respect to the cam elements 18 and 19 as required and the handle 23 is released whereupon the springs 24 and 27 retract theparts to which they are connected, and

the pin 11 is locked against rotation by re-engaging its seat in the boss 46.

Referring now to Figs. 10-12, the pin 11 is mounted to slide in the hole of the boss 46 and equipped with two depressions 28 and 29 and a vided for turret heads having more than six stations as illustrated and means according to my invention may be provided for reducing the number of stations to, say, one third of the normal stations instead of one half thereof, and if desired a third roller pin may be inserted in the hole 32 of disc 8.

I wish itflto be understood that I do not desire I to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

In the claims aflixedto this specification no selection of any particular modification of the invention is intended to the exclusion of other modifications thereof and the right to subsequently make claim to any modification not covered by these claims is expressly reserved.

I claim: 1. An apparatus for indexing the turret heads of lathes and the like, comprising means for indexing a turret head and means for locking the head in a series of indexed positions, a cam provided with a plurality of camming members, a cam follower cooperating with said camming members to render said locking means inop'erative during indexing and at certain of said-indexed positions, and means for adjusting said cam follower in position to cooperate-with at least one of said camming members, thereby varying the number of locking positions per revolution of said turret head.

,2. An apparatus for indexing the turret heads of lathes and the like, comprising means for 111- tating a turret head through a series of predeterniined angular positions, means for locking the head in said predetermined positions, a multiple cam, and a cam follower cooperating with said multiple cam for rendering said locking means inoperative during indexing and at certain of said predetermined positions, and adjusting means for positioning said cam fpllower to cooperatewith individual cam elements of said multiple cam, thereby varying the number of predetermined positions at which said locking means is rendered inoperative.

3. The apparatus of claim 2 wherein said cam follower is mounted at one end of a lever, the

other end of said lever carrying a member cooperating with'said locking means to render the same inoperative.

4. The apparatus of claim 2 wherein said adjusting means comprises a pin holding said cam follower mounted to slidein its mounting and resilient means for locking said pin in various 

